WO1996015968A1 - Dispositif pour amener une bande d'un materiau depuis une bobine d'alimentation vers une ligne de traitement et une unite comprenant une tel dispositif - Google Patents

Dispositif pour amener une bande d'un materiau depuis une bobine d'alimentation vers une ligne de traitement et une unite comprenant une tel dispositif Download PDF

Info

Publication number
WO1996015968A1
WO1996015968A1 PCT/SE1995/001380 SE9501380W WO9615968A1 WO 1996015968 A1 WO1996015968 A1 WO 1996015968A1 SE 9501380 W SE9501380 W SE 9501380W WO 9615968 A1 WO9615968 A1 WO 9615968A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
unit
arm
dancing arm
arrangement
Prior art date
Application number
PCT/SE1995/001380
Other languages
English (en)
Inventor
Harald E. BØRRESEN
Terje NYRÉN
Original Assignee
Mölnlycke AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mölnlycke AB filed Critical Mölnlycke AB
Priority to AU39971/95A priority Critical patent/AU690765B2/en
Priority to JP8516777A priority patent/JPH10509126A/ja
Priority to EP95938688A priority patent/EP0801630B1/fr
Priority to US08/836,720 priority patent/US5964390A/en
Priority to DE69515909T priority patent/DE69515909T2/de
Priority to CA002204847A priority patent/CA2204847C/fr
Priority to MX9703656A priority patent/MX9703656A/es
Publication of WO1996015968A1 publication Critical patent/WO1996015968A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • B65H23/025—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed

Definitions

  • the present invention relates to an arrangement for delivering a web of material from a storage reel to a process line, and also to a unit included in the arrangement.
  • a continu- ous web of material is conveyed through a process line, this material being either plastic film or nonwoven material.
  • Various operations are performed in the process line, such as the placing of one or more absorbent cores on the web, the application of elastic, the application of on an outer casing sheet, etc.
  • Individual articles are separated from the continuous web of article blanks in a terminal stage of the process. In order for this process to proceed smoothly without interruptions, it is very important that the tension in the delivered web is constant at its point of delivery.
  • the web delivered to the process line is taken from storage reels, which are carried in pairs by a reel stand which includes means for splicing the tailing end of the web on one reel with the leading end of the web on the other reel, so that web material will be delivered continuously to the process line.
  • These reel stands are often provided with units which are intended to ensure that the tension in the web leaving the reel stand is constant, even during the process of splicing together the webs of the old and the new reels while accelerating the new reel.
  • the object of the present invention is to provide means whereby the tension in the web will have a predetermined value at the point of its delivery to the process line, while enabling the reel stand carrying the web to be located far away from this point.
  • the unit includes a distributing roller, which ensures that the web delivered to the process line will not contain wrinkles, pleats or folds.
  • the invention also relates to a unit for controlling the tension in an outgoing web which passes through the unit, this unit including a spring-tensioned or spring-biassed dancing or jockey arm which is pivotal about a fixed axle and which is intended to support a loop in the web, said unit being characterized in that the spring-biassing force acts in a direction opposite to the force of gravity.
  • This arrangement enables the changes that occur in the torque acting on the dancing arm as the dancing arm rotates to be balanced by suitable geometry, so that web tension will be essentially unaffected by the rotational position of the dancing arm.
  • the unit includes a position indicator which senses the rotational position of the arm and delivers a position signal correspond ⁇ ing to this position, a pair of feeder rolls which are mounted at the upstream end of the unit and through which the web passes when the unit is operating, and a control means which receives the position signal from the position indicator and adjusts the rotational speed of the pair of feed rolls in accordance with this signal.
  • a distributing roll is mounted downstream of the pair of feed rolls and upstream of said means and functions to form the loop supported by the dancing arm.
  • the biassing forced is generated by a pull spring whose one end is pivotally attached to a lever arm which projects out from the dancing arm at the end thereof connected to the pivot axle, and whose other end is connected to an attachment means which can preferably be moved along a sloping path so as to enable the position of the attachment to be changed in relation to the dancing arm pivot axle, both laterally and vertically, as the attachment moves.
  • Fig. 1 illustrates schematically and in perspective the most significant components of a unit for controlling or adjusting the tension in an outgoing web of material, in accordance with the invention
  • Fig. 2 is a schematic front view of a unit for controlling or adjusting the tension of an outgoing web of material in accordance with a first embodiment of the invention, the front part of the unit being removed;
  • Fig. 3 is a schematic front view of the most significant parts of a unit for controlling or adjusting the tension of an outgoing web of material in accordance with a second embodi ⁇ ment of the invention.
  • the 1 includes a dancing arm 2 which is pivotal about an axle 3 provided on the right-hand end of the arm in Figure 1.
  • the arm is comprised of two parallel elongated beams 4, 5 whose right- hand ends are held together by the pivot axle 3 and whose left-hand end-parts are held together by two elongated rollers 6, 7, which are mutually spaced apart in the longitudinal direction of the arm.
  • the pivot axle 3 and the rollers 6, 7 extend perpendicular to the beams 4, 5.
  • rollers 8, 9, 10 Mounted beneath the arm 2 are three elongated rollers 8, 9, 10 which are mutually spaced apart in the horizontal direction and which are also displaced horizontally in relation to the rollers 6, 7 carried by the dancing arm when said arm is pivoted to a generally horizontal position.
  • the pivot axle 3 and the rollers 8-10 are carried by a fixed stand or housing.
  • the pivot axle 3 is rotatably mounted in the stand and an advantage is gained when the rollers 6, 7 and 8-10 are also rotatably journalled to the dancing arm and the stand respec ⁇ tively to reduce the friction between the web 1 and its associated rollers, although this is not necessary.
  • the dancing arm 2 is provided with a spring which is not shown in Figure 1 and which when acted upon by a downwardly project ⁇ ing end-part 11 of the dancing arm strives to pivot the arm upwards in Figure 1.
  • the unit also includes a position indicator, for instance an angle sensor which senses the rotational position of the dancing arm and sends a signal corresponding to this position to a control means 12, which adjusts the speed at which the web is advanced by a pair 13 of web feed rollers mounted at the inlet end of the unit.
  • the web 1 arriving at the unit will first pass through the nip between the feed rolls and will then pass beneath the roller 8, over the roller 6, beneath the roller 9, over the roller 7 and beneath the roller 10, whereafter it leaves the unit.
  • Web tension is determined by the pretension in the dancing arm 2 and any changes in the length of that part of the web which moves through the unit are taken-up by pivoting the dancing arm upwards or downwards, depending on whether the web has been lengthened or shortened.
  • Such length changes may be due to differences in the speed between the part of that part of the web that leaves the unit and that part of the web which runs through the roll pair 13. These differences in web speed can easily occur when starting-up the process line, at which stage the part of the web leaving the unit is delivered to an accelerating conveyor.
  • the changes in the length of the web moving through the unit may also be due to variations in the tension of that part of the web which arrives at the roll pair 13.
  • the control means 12 may be any suitable control means, for instance a microprocessor, which is programmed to control the web feeding speed of the roll pair 13, such that the dancing arm will be rotated or pivoted as little as possible from a starting position, e.g. the horizontal position shown in Figure 1. If the web is lengthened for some reason or other and the dancing arm 2 is thereby swung upwards, the earlier mentioned position indicator will send to the control means 12 a signal which corresponds to this pivotal movement of the arm 2. Upon receipt of the signal, the control means 12 causes the roll pair 13 to rotate at a slower speed.
  • a microprocessor which is programmed to control the web feeding speed of the roll pair 13, such that the dancing arm will be rotated or pivoted as little as possible from a starting position, e.g. the horizontal position shown in Figure 1. If the web is lengthened for some reason or other and the dancing arm 2 is thereby swung upwards, the earlier mentioned position indicator will send to the control means 12 a signal which corresponds to this pivotal movement of the arm 2.
  • Figure 2 illustrates a first embodiment of a unit which is principly of the same construction as the unit described with reference to Figure 1.
  • Components of the Figure 2 embodiment which are identical to the components of the Figure 1 embodi ⁇ ment have been identified by the same references.
  • the unit is shown in front view in the Figure, with the front of the housing H which carries the unit components being removed.
  • the unit illustrated in Figure 2 includes a spreader or smoothing roll 14 of known construction which functions to remove any folds or wrinkles that may be present in the web 1.
  • Figure 2 also shows a suction conveyor 15 which is included in the process line and which has a driven wheel 16 on which that part of the web 1 leaving the unit is taken-up.
  • FIG 2 Also shown in Figure 2 is a tension measuring wheel 17 which may be of any appropriate kind and which measures the tension in the web 1, this measuring wheel being mounted in the housing if so desired, and also a mechanism 18 which parts the rolls of the roll pair 13 so as to facilitate insertion of the leading end of the web 1 through the roll pair prior to starting-up the process line.
  • a similar mechanism may be provided for the roll pair 15.
  • Figure 2 also shows schemati ⁇ cally a reel stand R from which the web 1 is unwound.
  • pull spring 19 which pretensions or spring biases the dancing arm 2.
  • One end of the spring is connected pivotally to the downwardly projecting part 11 of the arm and the other end of the spring is pivotally connected to an attachment means 20 mounted on the housing H.
  • FIG. 3 illustrates a second embodiment of an inventive unit which is generally of the same construction as the unit illustrated in Figure 2. Those components of the Figure 2 unit which find correspondence in the unit illustrated in Figure 1 have been given the same references with the addition of a prime.
  • the web tension can be adjusted in the unit shown in Figure 2.
  • the attachment means 20' can be moved fixedly to the housing (not shown in Figure 2) carrying the unit, so that the spring force can be changed by extending or shorten ⁇ ing the spring 19M
  • This movability of the attachment means 20 is achieved by mounting said means on a slide 21 which can be moved along a guide bar 22 and fixed in any desired position along said bar.
  • the spring attachment points can be chosen so that web tension will not be influenced by the position to which the dancing arm is rotated. However, this only applies in relation to a given determined web tension. If the spring force is changed, and therewith also the tension in the web, by moving the spring attachment point on the housing, the favourable geometric relationships which in a given load case result in the variation of web tension due to rotation of the dancing arm being practically zero will also change. However, it has been found that even in such a case, the aforesaid web tension variation can be minimized by moving the attachment point in a given path when changing the spring force. It has also been found that this path can be approximated to a straight line.
  • the guide bar 22 is inclined so that the attachment means 20' will move both horizontally and vertically in relation to the pivot axle 3' as the slide 21 is moved along the guide bar 22.
  • the described units may be placed as close as possible to the process line while being located at a far distance from associated reel stands.
  • the described units are constructed in a manner which enables the units to be given small dimensions, thereby facilitating positioning of the units close to the process line.
  • the buffer length of the web 1 which shall be capable of being taken-up by the unit during operation, will also be small.
  • the dancing arm carries two rollers 6, 7 which in the case of the illustrated units means that this buffer length is divided into two loops, which further reduces the need for space in the vertical direction in order to accommodate desired buffer lengths.
  • the described inventive units can therefore be given a very compact construction.
  • the spreader roll 14 can be placed upstream of the feed rolls instead of downstream thereof.
  • the dancing arm may also carry fewer or more web-loop supporting rollers and the position of the units in relation to the conveyors of the process line may be varied.
  • the units may be placed above or beneath the conveyor instead of on one side thereof. The invention is therefore restricted solely by the content of the following Claims.

Abstract

La présente invention concerne un dispositif pour amener une bande de matériau (1) depuis une bobine d'alimentation vers une ligne de traitement (16). Selon l'invention, une unité qui agit pour réguler la tension dans la bande est à une certaine distance de la bobine d'alimentation et elle est placée au voisinage immédiat de la ligne de traitement. L'invention concerne également une unité permettant d'incorporer un tel dispositif.
PCT/SE1995/001380 1994-11-23 1995-11-21 Dispositif pour amener une bande d'un materiau depuis une bobine d'alimentation vers une ligne de traitement et une unite comprenant une tel dispositif WO1996015968A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU39971/95A AU690765B2 (en) 1994-11-23 1995-11-21 An arrangement for delivering a web of material from a storage reel to a process line, and a unit included in the arrangement
JP8516777A JPH10509126A (ja) 1994-11-23 1995-11-21 材料ウェブを貯蔵リールからプロセスラインへ配送するための装置、およびその装置に含まれるユニット
EP95938688A EP0801630B1 (fr) 1994-11-23 1995-11-21 Dispositif pour amener une bande d'un materiau depuis une bobine d'alimentation vers une ligne de traitement et une unite comprenant une tel dispositif
US08/836,720 US5964390A (en) 1994-11-23 1995-11-21 Arrangement and web tension control unit for web delivery
DE69515909T DE69515909T2 (de) 1994-11-23 1995-11-21 Einrichtung zum zuliefern von bahnmaterial von einer speichertrommel zu einer fertigungslinie, und eine anlage mit einer solchen einrichtung
CA002204847A CA2204847C (fr) 1994-11-23 1995-11-21 Dispositif pour amener une bande d'un materiau depuis une bobine d'alimentation vers une ligne de traitement et une unite comprenant une tel dispositif
MX9703656A MX9703656A (es) 1994-11-23 1995-11-21 Un arreglo para entregar una banda de material desde un carrete de almacenamiento de una linea de proceso, y una unidad incluida en el arreglo.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9404067A SE507318C2 (sv) 1994-11-23 1994-11-23 Aggregat för att reglera utgående spänning i en materialbana
SE9404067-2 1994-11-23

Publications (1)

Publication Number Publication Date
WO1996015968A1 true WO1996015968A1 (fr) 1996-05-30

Family

ID=20396093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001380 WO1996015968A1 (fr) 1994-11-23 1995-11-21 Dispositif pour amener une bande d'un materiau depuis une bobine d'alimentation vers une ligne de traitement et une unite comprenant une tel dispositif

Country Status (10)

Country Link
US (2) US5964390A (fr)
EP (2) EP0801630B1 (fr)
JP (1) JPH10509126A (fr)
AU (1) AU690765B2 (fr)
CA (1) CA2204847C (fr)
DE (2) DE69531876T2 (fr)
MX (1) MX9703656A (fr)
NZ (2) NZ336582A (fr)
SE (1) SE507318C2 (fr)
WO (1) WO1996015968A1 (fr)

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WO1999004963A1 (fr) * 1997-07-28 1999-02-04 Ranpak Corp. Convertisseur de matelassage a alimentation mecanique
US6174273B1 (en) 1998-12-18 2001-01-16 Ranpak Corp. Cushioning conversion machine with tension control
US8062459B2 (en) 2004-03-05 2011-11-22 Zuiko Corporation Velocity-changing apparatus for web

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WO1999004963A1 (fr) * 1997-07-28 1999-02-04 Ranpak Corp. Convertisseur de matelassage a alimentation mecanique
US6155963A (en) * 1997-07-28 2000-12-05 Ranpak Corp. Cushioning conversion machine with power infeed
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Also Published As

Publication number Publication date
DE69515909D1 (de) 2000-04-27
NZ296230A (en) 1999-08-30
US5964390A (en) 1999-10-12
US6276587B1 (en) 2001-08-21
EP0949175A2 (fr) 1999-10-13
CA2204847A1 (fr) 1996-05-30
AU690765B2 (en) 1998-04-30
AU3997195A (en) 1996-06-17
MX9703656A (es) 1997-08-30
DE69531876D1 (de) 2003-11-06
DE69531876T2 (de) 2004-07-15
EP0801630B1 (fr) 2000-03-22
DE69515909T2 (de) 2000-10-26
SE9404067D0 (sv) 1994-11-23
NZ336582A (en) 2001-01-26
CA2204847C (fr) 2007-01-16
SE9404067L (sv) 1996-05-24
EP0949175B1 (fr) 2003-10-01
SE507318C2 (sv) 1998-05-11
JPH10509126A (ja) 1998-09-08
EP0801630A1 (fr) 1997-10-22
EP0949175A3 (fr) 1999-12-15

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